Tn this paper we extend the work of Elperin et at: [Phys. Rev. Lett. 80, 69
(1998)] by showing that a turbulent Dufour-type effect is also present in
chemically nonreacting gaseous admixtures. This result is used to analyze t
he possibility of obtaining turbulent analogs of the Onsager relations, a f
undamental result for molecular crossed effects in irreversible thermodynam
ics. [S1063-651X(99)11708-2].